接下来，一系列的节点将会添加到消息流编辑器画布中，其中包括主消息流和子消息流（请参见下面的内容）。

Next a series of nodes is added to the Message Flow Editor Canvas, consisting of a main message flow and a subflow (see below).

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下一步是创建画布部件并使之充满整个主窗口。

The next step has created a Canvas widget and had it fill the entire MainWindow.

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在循环完成后，另一套画布、密码文本框和Submit按钮将被创建并封装到t k主窗口中。

After the loop, another canvas, password text box, and Submit button are created and packed into the Tk main window.

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在循环完成后，另一套画布、密码文本框和Submit按钮将被创建并封装到t k主窗口中。

After the loop, another canvas, password text box, and Submit button are created and packed into the Tk main window.

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